SIMATIC ET 200S distributed I/O SIMATIC ET 200S distributed I/O 2AI U HS analog electronic module (6ES7134-4FB52-0AB0) Manual Preface Properties 1 Parameters 2 Diagnostics 3 Analog value representation 4 Connecting 5 01/2008 A5E01076015-02
Safety Guidelines Safety Guidelines This manual contains notices you have to observe in order to ensure your personal safety, as well as to prevent damage to property. The notices referring to your personal safety are highlighted in the manual by a safety alert symbol, notices referring only to property damage have no safety alert symbol. These notices shown below are graded according to the degree of danger. DANGER indicates that death or severe personal injury will result if proper precautions are not taken. WARNING indicates that death or severe personal injury may result if proper precautions are not taken. CAUTION with a safety alert symbol, indicates that minor personal injury can result if proper precautions are not taken. CAUTION without a safety alert symbol, indicates that property damage can result if proper precautions are not taken. NOTICE Qualified Personnel Prescribed Usage Trademarks indicates that an unintended result or situation can occur if the corresponding information is not taken into account. If more than one degree of danger is present, the warning notice representing the highest degree of danger will be used. A notice warning of injury to persons with a safety alert symbol may also include a warning relating to property damage. The device/system may only be set up and used in conjunction with this documentation. Commissioning and operation of a device/system may only be performed by qualified personnel. Within the context of the safety notes in this documentation qualified persons are defined as persons who are authorized to commission, ground and label devices, systems and circuits in accordance with established safety practices and standards. Note the following Disclaimer of Liability WARNING This device may only be used for the applications described in the catalog or the technical description and only in connection with devices or components from other manufacturers which have been approved or recommended by Siemens. Correct, reliable operation of the product requires proper transport, storage, positioning and assembly as well as careful operation and maintenance. All names identified by are registered trademarks of the Siemens AG. The remaining trademarks in this publication may be trademarks whose use by third parties for their own purposes could violate the rights of the owner. We have reviewed the contents of this publication to ensure consistency with the hardware and software described. Since variance cannot be precluded entirely, we cannot guarantee full consistency. However, the information in this publication is reviewed regularly and any necessary corrections are included in subsequent editions. 이기기는업무용 (A 급 ) 전자파적합기기로서판매자또는사용자는이점을주의하시기바라며가정외의지역에서사용하는것을목적으로합니다. Siemens AG Automation and Drives Postfach 48 48 90327 NÜRNBERG GERMANY A5E01076015-02 P 02/2008 Copyright Siemens AG 2008. Technical data subject to change
Preface Preface Purpose of the manual This manual supplements the ET 200S Distributed I/O System Operating Instructions. General functions for the ET 200S are described in the ET 200S Distributed I/O System Operating Instructions. The information in this document along with the operating instructions enables you to commission the ET 200S. Basic knowledge requirements To understand these operating instructions you should have general knowledge of automation engineering. Scope of the manual This manual applies to this ET 200S module. It describes the components that are valid at the time of publication. Recycling and disposal Thanks to the fact that it is low in contaminants, this ET 200S module is recyclable. For environmentally compliant recycling and disposal of your electronic waste, please contact a company certified for the disposal of electronic waste. Additional support If you have any questions relating to the products described in these operating instructions, and do not find the answers in this document, please contact your local Siemens representative. http//www.siemens.com/automation/partner The portal to our technical documentation for the various SIMATIC products and systems is available at http//www.siemens.com/automation/simatic/portal The online catalog and ordering system are available at http//www.siemens.com/automation/mall Manual, 01/2008, A5E01076015-02 3
Preface Training center We offer courses to help you get started with the ET 200S and the SIMATIC S7 automation system. Please contact your regional training center or the central training center in D -90327, Nuremberg, Germany. Phone +49 (911) 895-3200. http//www.siemens.com/sitrain Technical Support You can reach technical support for all A&D projects using the support request web form http//www.siemens.com/automation/support-request Phone + 49 180 5050 222 Fax + 49 180 5050 223 For more information about our technical support, refer to our Web site at http//www.siemens.de/automation/service Service & Support on the Internet In addition to our documentation services, you can also make use of our comprehensive online knowledge base on the Internet. http//www.siemens.com/automation/service&support There you will find Our Newsletter, which constantly provides you with the latest information about your products. The right documentation for you using our Service & Support search engine. The bulletin board, a worldwide knowledge exchange for users and experts. Your local contact for Automation & Drives in our contact database. Information about on-site services, repairs, spare parts. Lots more can be found on our "Services" pages. 4 Manual, 01/2008, A5E01076015-02
Table of contents Preface... 3 1 Properties... 7 1.1...7 1.2 Compatibility with the predecessor module...12 2 Parameters... 13 2.1 Parameters...13 2.2 Parameter description...14 3 Diagnostics... 15 3.1 Diagnostics using LED display...15 3.2 Error types...16 3.3 Interrupts...17 4 Analog value representation... 19 4.1 Introduction...19 4.2 Analog value representation for measuring range with SIMATIC S7...19 4.3 Measuring ranges...20 4.4 Effect on analog value representation...21 4.4.1 Effect of the supply voltage and the operating state on analog input values...21 4.4.2 Effect of the value range on the 2AI U HS analog input...22 5 Connecting... 23 5.1 Connecting measuring sensors...23 5.2 Wiring unused channels of the analog input modules...26 5.3 Using the shield connection...26 Index... 27 Manual, 01/2008, A5E01076015-02 5
Table of contents 6 Manual, 01/2008, A5E01076015-02
Properties 1 1.1 Properties 2 inputs for measuring voltage Input ranges ± 10 V, resolution 15 bit + sign ± 5 V, resolution 15 bit + sign ± 2.5 V, resolution 14 bit + sign 1 to 5 V, resolution 15 bit Isolated from the load voltage L+ Permitted common mode voltage 35 VACSS Supports isochronous operation Minimum time for the isochronous DP cycle (TDPmin) 250 µs Minimum conversion time of the input modules (TWE) 100 µs Firmware update of electronic module is possible. Note Inputs must not be connected in parallel for the voltage measurement. If the non-isolated sensor is connected to the 2AI U HS electronic module, the evaluation of diagnostics (wire break) may not work properly. Manual, 01/2008, A5E01076015-02 7
Properties 1.1 General terminal assignment Note Terminals 4, 8, A4, A8, A3 and A7 are only available at specified terminal modules. Terminal assignment for 2AI U HS (6ES7134-4FB52-0AB0) Terminal Assignment Terminal Assignment Notes 1 M0+ 5 M1+ Mn+ Input signal "+", Channel n 2 M0-6 M1- Mn- Input signal "-", Channel n 3 Mana 7 Mana Ground of the module Mana 4 n.c. 8 n.c. n.c. Not connected (max. 30 VDC can be connected) A4 AUX1 A8 AUX1 AUX1 Protective-conductor terminal or potential bus (freely usable up to 230 VAC) A3 AUX1 A7 AUX1 Usable terminal modules TM-E15C26-A1 (6ES7193-4CA50-0AA0) TM-E15S26-A1 (6ES7193-4CA40-0AA0) TM-E15N26-A1 (6ES7193-4CA80-0AA0) TM-E15C24-A1 (6ES7193-4CA30-0AA0) TM-E15S24-A1 (6ES7193-4CA20-0AA0) TM-E15N24-A1 (6ES7193-4CA70-0AA0) Usable terminal modules for 2AI U HS (6ES7134-4FB52-0AB0) TM-E15C24-01 (6ES7193-4CB30-0AA0) TM-E15S24-01 (6ES7193-4CB20-0AA0) TM-E15N24-01 (6ES7193-4CB70-0AA0) TM-E15C23-01 (6ES7193-4CB10-0AA0) TM-E15S23-01 (6ES7193-4CB00-0AA0) TM-E15N23-01 (6ES7193-4CB60-0AA0) Spring terminal Screw-type terminal Fast Connect 8 Manual, 01/2008, A5E01076015-02
Properties 1.1 Block diagram µ Figure 1-1 Block diagram of the 2AI U HS Technical specifications for 2AI U HS (6ES7134-4FB52-0AB0) Dimensions and weight Width (mm) 15 Weight Approx. 40 g Module-specific data Supports isochronous operation Yes Supports I&M functions Yes Number of inputs 2 Cable length Shielded Max. 200 m Parameter length 12 bytes (4 bytes when used as 6ES7134 4FB50-0AB0) Address space 4 bytes Voltages, currents, potentials Rated load voltage L+ (from the power module) 24 VDC Reverse polarity protection Yes Galvanic isolation Between the channels and backplane bus Yes Between the channels and load voltage L+ Yes Between the channels No Permissible potential difference Between the inputs and MANA (UCM) 35 VACSS Between MANA and the central grounding point 75 VDC / 60 VAC (UISO) Insulation tested 500 VDC Current consumption Power supply and load voltage L+ (no load) Max. 130 ma Power dissipation of the module 2 W Status, interrupts, diagnostics Interrupts Hardware interrupt Can be assigned parameters 1 Diagnostics function Group error display Red "SF" LED Diagnostic information can be displayed Possible 2 Manual, 01/2008, A5E01076015-02 9
Properties 1.1 Analog value generation Measuring principle SAR (Successive Approximation Register) Cycle time/resolution Conversion time in µs (per channel) 15 Cycle time in ms (per module) 0,25 Resolution (including overrange) ± 10 V/15 bit + sign ± 5 V/15 bit + sign ± 2.5 V/14 bit + sign 1 to 5 V/15 bit Suppression of interference, limits of error Common mode interference (Ucm) < 35 VSS) > 70 db Crosstalk between the inputs < 50 db Operational limit ± 0,3 % 3 (in the entire temperature range, with reference to the input range) Basic error limit (operational limit at 25 C with ± 0,2 % 3 reference to input range) Temperature error (with reference to the input ± 0.01 %/K 3 range) Linearity error (with reference to the input range) ± 0,03 % 3 Repeatability ± 0,1 % 3 (in steady state at 25 C with reference to input range) Data for selecting a sensor Input ranges (rated value)/input resistance Voltage ± 10 V/min. 120 kω ± 5 V/min. 120 kω ± 2.5 V/min. 120 kω 1-5 V/min. 120 kω Maximum input voltage for voltage input 35 V continuous (destruction limit) Connection of the sensors For measuring voltage Supported Smoothing of the measured values Yes, can be assigned parameters in 4 steps by means of digital filtering Step None Weak Medium Strong 1 For interface modules with process interrupt capability only 2 Parameter assignment error Violation of lower limit value Violation of upper limit value Open circuit (only with 1 V to 5 V) Process interrupt lost 3 These values are doubled for measurement range ± 2.5 V Time constant 1 x cycle time 4 x cycle time 16 x cycle time 32 x cycle time 10 Manual, 01/2008, A5E01076015-02
Properties 1.1 Firmware update To add functions and for troubleshooting, it is possible to load firmware updates to the operating system memory of the electronic module using STEP 7 HW Config. Note When you launch the firmware update, the old firmware is deleted. If the firmware update is interrupted or canceled, the electronic module will no longer be capable of functioning. Restart the firmware update and wait until it has completed successfully. Note If the ET 200S is operated in conjunction with an S7-300 CPU with PROFIBUS DP interface or an ET 200S Interface Module IM151-3 PN HIGH SPEED, a station failure of the ET 200S can occur during the firmware update. I&M functions and firmware update The interface modules identified in the table below (as of order number) can be used to read and write I&M data from the module and for the firmware update. Interface module IM151-1 HIGH FEATURE IM151-3 PN IM151-3 PN HIGH FEATURE IM151-3 PN FO IM151-7 CPU as of order number 6ES7151-1BA02-0AB0 6ES7151-3AA22-0AB0 6ES7151-3BA22-0AB0 6ES7151-3BB22-0AB0 6ES7151-7AA20-0AB0 Manual, 01/2008, A5E01076015-02 11
Properties 1.2 Compatibility with the predecessor module 1.2 Compatibility with the predecessor module Compatible with 2AI U HS analog electronic module (6ES7134-4FB51-0AB0 / 6ES7134-4FB50-0AB0) If you configure the 2AI U HS (6ES7134-4FB52-0AB0) as the predecessor module (6ES7134-4FB51-0AB0/ 6ES7134-4FB50-0AB0), it behaves compatibly. The following technical specifications of the 2AI U HS (6ES7134-4FB52-0AB0) are set according to the predecessor module (6ES7134-4FB51-0AB0/ 6ES7134-4FB50-0AB0) Technical specifications for 2AI U HS 6ES7134-4FB52-0AB0 configured as 6ES7134-4FB51-0AB0/ 6ES7134-4FB50-0AB0 Analog value generation Cycle time in ms (per module) 0.25 ms 1 ms Resolution (including overrange) ± 10 V/15 bit + sign ± 10 V/13 bit + sign ± 5 V/15 bit + sign ± 5 V/13 bit + sign ± 2.5 V/14 bit + sign ± 2.5 V/13 bit + sign 1 to 5 V/15 bit 1 V to 5 V/13 bits Sensor selection data Smoothing of the measured values Time constant 1 x cycle time 4 x cycle time 16 x cycle time 32 x cycle time Time constant 1 x cycle time 64 x cycle time 128 x cycle time 512 x cycle time Current consumption and power loss Note the change in the values for current consumption, power loss, common mode voltage, and destruction limit of the 2AI U HS (6ES7134-4FB52-0AB0) compared to the predecessor module (6ES7134-4FB51-0AB0/ 6ES7134-4FB50-0AB0). 12 Manual, 01/2008, A5E01076015-02
Parameters 2 2.1 Parameters Table 2-1 Parameters for analog input module 2AI U HS Range of values Default setting Applicability Group diagnostics (parameter Disable assignment error, internal error) Enable Diagnostics Overflow/underflow Disable Enable Diagnostics Wire break at 1 to 5 V Disable Enable Smoothing None Weak Medium Strong Hardware interrupt enable Disable Enable Type/range of measurement Deactivated ± 2,5 V ± 5 V ± 10 V 1 ma to 5 V High limit low to high limit of the overrange Low limit Low to high limit of the nominal range Disable Disable Disable None Disable Module Module Channel Channel Module ± 10 V Channel Depending on the measuring range Depending on the measuring range Channel Channel Note If you deactivate a channel of the electronic module, you do not gain any advantages in terms of speed due to the measuring procedure. Manual, 01/2008, A5E01076015-02 13
Parameters 2.2 Parameter description 2.2 Parameter description Smoothing The individual measured values are smoothed by digital filtering. The smoothing can be adjusted in four steps, in which the smoothing factor k multiplied by the cycle time of the electronic module equals the time constant of the smoothing filter. The higher the smoothing, the greater the time constant of the filter. The following diagrams show the step response with the various smoothing factors depending on the number of module cycles. Figure 2-1 Smoothing for 2AI I 2WIRE HS (as of 6ES7134-4GB52-0AB0) Figure 2-2 Smoothing for 2AI I 2WIRE HS (6ES7134-4GB51-0AB0) 14 Manual, 01/2008, A5E01076015-02
Diagnostics 3 3.1 Diagnostics using LED display LED display 1 1 Batch error (red) Status and error displays Event (LED) SF On Cause No configuration or incorrect module plugged in. No load voltage.present There is a diagnostic message. Remedy Check the parameter assignment. Check the load voltage. Evaluate the diagnostics. Manual, 01/2008, A5E01076015-02 15
Diagnostics 3.2 Error types 3.2 Error types Analog input module error types Table 3-1 Error types 31D 22D 16D Error type Meaning Remedy 11111 Channel The firmware is being updated. -- temporarily Channel 0 applies to the entire unavailable module. The module does not perform any measurements during this time. 10110 Hardware interrupt lost 10000 Parameter assignment error A hardware interrupt was not detected. Module cannot use the parameter for the channel Inserted module does not match the configuration. Faulty parameter assignment. 9D 01001 Errors Internal module error (diagnostics message at channel 0 applies to the entire module) 8D 7D 01000 Low limit fallen below 00111 High limit exceeded 6D 00110 Open circuit Line to the encoder is interrupted. Correction or coordination of the program, process, module Correct the configuration (align actual and preset configuration). Correct the parameter assignment (diagnostics wire break configured for the permitted measuring range only). Replace the module. Value is below the underrange. Correct the module/actuator tuning. Value is above the overrange. Correct the module/actuator tuning. Correct the process wiring. 16 Manual, 01/2008, A5E01076015-02
Diagnostics 3.3 Interrupts 3.3 Interrupts Hardware interrupt of analog input modules Figure 3-1 Structure as of Byte x+4 and Byte x+5 for hardware interrupt (analog input) Manual, 01/2008, A5E01076015-02 17
Diagnostics 3.3 Interrupts 18 Manual, 01/2008, A5E01076015-02
Analog value representation 4 4.1 Introduction Electronic modules with analog outputs With the electronic module with analog inputs, continuously variable signals, such as those occurring in temperature measurement and resistance measurement, can be acquired, evaluated, and converted to digital values for further processing. 4.2 Analog value representation for measuring range with SIMATIC S7 Analog value representation With the same nominal range, the digitized analog value is the same for input and output values. Analog values are represented in two's complement. The following table shows the analog value representation for the analog electronic modules. Table 4-1 Analog value representation (SIMATIC S7 format) Resolution Analog value Bit number 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Significance of the bits S 2 14 2 13 2 12 2 11 2 10 2 9 2 8 2 7 2 6 2 5 2 4 2 3 2 2 2 1 2 0 Sign The sign (S) of the analog value is always in bit number 15 "0" + "1" Manual, 01/2008, A5E01076015-02 19
Analog value representation 4.3 Measuring ranges Analog values The following table shows the representation of the binary analog values and the corresponding decimal and hexadecimal representation of the units of the analog values. The table below shows the 11, 12, 13, 14, and 15 bit resolutions + sign. Each analog value is entered left aligned in the ACCU. The bits marked with "x" are set to "0". Table 4-2 Analog values (SIMATIC S7 format) Resolution in bits Units Analog value Decimal Hexadecimal High byte Low byte 11+S 16 10H S 0 0 0 0 0 0 0 0 0 0 1 x x x x 12+S 8 8H S 0 0 0 0 0 0 0 0 0 0 0 1 x x x 13+S 4 4H S 0 0 0 0 0 0 0 0 0 0 0 0 1 x x 14+S 2 4H S 0 0 0 0 0 0 0 0 0 0 0 0 0 1 x 15 + sign 1 1H S 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 4.3 Measuring ranges Introduction The following tables contain the digitized analog values for the measuring ranges of the analog input modules. Since the binary representation of the analog values is always the same, these tables contain only a comparison of the measuring ranges with the units. Measuring ranges for voltage ± 2.5 V, ± 5 V and ± 10 V Table 4-3 SIMATIC S7 format Measuring ranges ± 2.5 V, ± 5 V and ± 10 V Measuring range ± 2.5 V Measuring range ± 5 V Measuring range Units ± 10 V Decimal Hexadecimal Range > 2,9397 > 5,8794 > 11,7589 32767 7FFFH Overflow 2,9397 5,8794 11,7589 32511 7EFFH Overshoot range 2,5001 5,0002 10,0004 27649 6C01H 2,5 1,86 5,00 3,75 10,00 7,50 27648 20736 6C00H 5100H Rated range -1,86-2,50-3,75-5,00-7,50-10,00-20736 -27648 AF00H 9400H -2,5001-5,0002-10,0004-27649 93FFH Undershoot range -2,9397-5,8796-11,759-32512 8100H < -2,9397 < -5,8796 < -11,759-32768 8000H Underflow 20 Manual, 01/2008, A5E01076015-02
Analog value representation 4.3 Measuring ranges Voltage measuring ranges 1 ma to 5 V Table 4-4 SIMATIC S7 format Measuring range 1 V to 5 V Measuring range Units Range 1 V to 5 V Decimal Hexadecimal > 5,704 32767 7FFFH Overflow 5,704 32511 7EFFH Overrange 5,00014 27649 6C01H 5,000 4,000 27648 20736 6C00H 5100H Rated range 1,000 0 0H 0,99986-1 FFFFH Undershoot range 0,296-4864 ED00H < 0,296-32768 8000H Underflow Measured values in the event of a wire break as a function of enabled diagnostics The following additional information applies to the voltage measuring range 1 to 5 V Table 4-5 Measured values in the event of a wire break as a function of enabled diagnostics Format Parameter assignment 1 Measured values Explanation Decimal Hexadecimal S7 "Wire break" diagnostics enabled 32767 7FFFH "Open circuit" diagnostic message "Wire break" diagnostics disabled -32767 8000H Measured value after leaving the underrange "Overflow/underflow" diagnostics enabled "Wire break" diagnostics disabled "Overflow/underflow" diagnostics disabled 1 Measuring range limits for wire break and underflow detection at 0.296 V "Low limit fallen below" diagnostic message -32767 8000H Measured value after leaving the underrange Manual, 01/2008, A5E01076015-02 21
Analog value representation 4.4 Effect on analog value representation 4.4 Effect on analog value representation 4.4.1 Effect of the supply voltage and the operating state on analog input values The input values of the analog modules are dependent on the supply voltage for electronics/encoders and on the operating state of the PLC (CPU of the DP master). The table below shows this dependency.. Table 4-6 Dependence of the analog input values on the operating state of the PLC (CPU of the DP master) and the supply voltage L+ Operating state of the PLC (CPU of the DP master) POWER ON RUN Power supply L+ on ET 200S (power module) L+ present Input value of the electronics module with analog inputs (evaluation possible on the CPU of the DP master) Process values 7FFFH until first conversion after startup, or after assignment of parameters for the module is completed. POWER ON STOP L+ missing 7FFFH L+ present Process value POWER OFF - L+ missing 7FFFH L+ present - L+ missing - 4.4.2 Effect of the value range on the 2AI U HS analog input The response of the electronics modules with analog inputs depends on the part of the value range in which the input values are located. The table below shows this dependency.. Table 4-7 Response of the analog modules, depending on the location of the analog input value in the range of values Measured value within... Input value in SIMATIC S7 format Input value in SIMATIC S5 format Rated range Measured value Measured value Over-/Undershoot range Measured value Measured value Overflow 7FFFH End of the overshoot range +1 plus overflow bit Underflow 8000H End of the undershoot range -1 plus overflow bit Prior to parameter assignment, or incorrect parameter assignment 7FFFH 7FFFH 22 Manual, 01/2008, A5E01076015-02
Connecting 5 5.1 Connecting measuring sensors Introduction You can connect encoders with voltage signals to the 2AI U HS analog input module. In this chapter you will find out how to connect the measuring sensors and what to watch for when doing so. Lines for analog signals You should use shielded and twisted-pair lines for the analog signals. This reduces the effect of interference. You should ground the shield of the analog lines at both ends of the line. If there are differences in potential between the ends of the line, a compensating current flows via the shield that can interfere with the analog signals. If this is the case, you should only ground the shield at one end of the line. Analog input modules The analog input modules are galvanically isolated Between logic and backplane bus Between load voltage and the channels There is no connection between MANA and the central grounding point. Note Ensure that this difference in potential UISO does not exceed the permitted value. If there is a possibility of exceeding the permitted value, make a connection between terminal MANA and the central grounding point. Connecting measuring encoders to analog inputs Between the measuring lines M- of the input channels and the reference point of the measuring circuit MANA there can be only a limited potential difference UCM (common-mode voltage). To ensure that the permitted value is not exceeded, you must take different steps depending on the whether the sensors are isolated or non-isolated. The steps you have to take are described in this chapter. Manual, 01/2008, A5E01076015-02 23
Connecting 5.1 Connecting measuring sensors Abbreviations used The meanings of the abbreviations in the figures below are as follows M + M - MANA M L + UCM UISO Measuring line (positive) Measuring line (negative) Analog measuring circuit reference potential Frame connection Rated load voltage 24 VDC Potential difference between inputs and reference potential of the measuring circuit MANA Potential difference between MANA and central grounding point Isolated measuring sensors The isolated measuring sensors are not connected to the local ground potential. They can be floating. Depending on local conditions or interference, potential differences UCM (static or dynamic) can occur between the measuring lines M- of the input channels and the reference point of the measuring circuit MANA. To ensure that the permitted value for UCM is not exceeded in environments with strong EMC interference, the following applies For the 2 AI U analog input module Connect M- with MANA! The following figure illustrates the connection of isolated measuring sensors to the floating analog input modules. 5 1 2 3 4 1 2 3 4 5 Logic Backplane bus Ground bus Central grounding point Isolated measuring sensors 24 Manual, 01/2008, A5E01076015-02
Connecting 5.1 Connecting measuring sensors Non-isolated measuring sensors The non-isolated measuring sensors are connected to the local ground potential. You must connect MANA to the ground potential. Depending on local conditions or interference, potential differences UCM (static or dynamic) can occur between the locally distributed measuring points. If the permitted value for UCM is exceeded, there must be equipotential bonding conductors between the measuring points. The following figure illustrates the connection of non-isolated measuring sensors to a floating analog input module. 5 1 2 4 3 1 2 3 4 5 Logic Backplane bus Ground bus Equipotential bonding cable Non-isolated measuring sensors Sensor selection Note the following factors when selecting the sensors Length, impedance, and capacitance of the cable Reaction speed of the utilized sensors Manual, 01/2008, A5E01076015-02 25
Connecting 5.2 Wiring unused channels of the analog input modules 5.2 Wiring unused channels of the analog input modules Rules Pay attention to the following instructions when wiring unused channels "Disable" unused input channels when setting parameters. A disabled channel always returns the value 7FFFH. The cycle time remains unchanged at 250 µs. If there are unused channels, you must wire the jumpers on the terminal module 2AI U HS Analog input module TM connection terminal Channel 0 Channel 1 1 2 3 4 5 6 7 8 5.3 Using the shield connection Rules To prevent interference we recommend the following with the analog electronic modules Use shielded wires to the sensors and actuators. Lay out the wire shields on the shield connection. Connect the shield connection with low impedance to the ground bus. 26 Manual, 01/2008, A5E01076015-02
Index 4 4-wire transducer, 25 A Analog electronic module 2AI U HS Block diagram, 9 Properties, 7 Technical specifications, 9 Terminal assignment, 8 Analog input modules Error types, 16 Analog value representation, 23 B Basic knowledge requirements, 3 Behavior of the analog modules, 22 at faults, 22 During operation, 22 C Connecting, 23 Connection of measuring sensors to analog inputs, 23 M Measured value resolution, 20 Measuring ranges with SIMATIC S7, 19 Measuring sensors, 23 N Non-isolated measuring sensors, 25 R Recycling, 3 S Scope Manual, 3 Service & Support, 4 Shield contact, 26 Smoothing, 14 T Technical Support, 4 Training center, 4 D Disposal, 3 I Internet Service & Support, 4 Isolated measuring sensors, 24 L LED display, 15 Lines for analog signals, 23 Manual, 01/2008, A5E01076015-02 27
Index 28 Manual, 01/2008, A5E01076015-02